Azure seems to be mostly used by Microsoft partners and companies that have an unhealthy dependency on Microsoft ( at least on the French market). The majority

Azure seems to be mostly used by Microsoft partners and companies that have an unhealthy dependency on Microsoft ( at least on the French market). The majority of companies ( and engineers) are on AWS, some on GCP ( mostly startups, either for the credits, ML or k8s goodies). As for serverless, that's why we have Knative now. Developing for it makes your "serverless" portable between providers ( many implement it, worse case scenario you can run it yourself on any k8s anywhere).